In court Thursday, a judge offered three years in exchange for a guilty plea, but state Fire Marshal Stephen Coan says that's not enough time.

"I am outraged at the plea deal offered," Coan said in a statement. "Arson fires take a toll on our firefighters and are the type of fires that cause the most firefighter injuries. Arson fires tear at the very fabric of a community, burdening public safety resources, affecting tax revenues, jobs and creating blight."

The district attorney asked for eight to 12 years, and Coan said that would be more fair.

Judge Carol Ball offered Sargent a prison sentence of two to three years and Louis a sentence of two and a-half years in exchange for guilty pleas.

"I understand what judge was saying and where she was coming from with sentencing guidelines. But I believe that she did state that she did pick most likely the middle of the road on the sentencing and she did state as we all know, there were approximately 30 fires in southeastern Massachusetts which they may have been linked to. We definitely would have preferred a sentence of the maximum," said Whitman Fire Chief Timothy Grenno, who is president of Fire Chief's Association of Plymouth County.

"The charge of arson violates your home it violates your business it violates your soul," Grenno said. "For the judge to take the medium pathway of an arson charge is disrespectful to the fire service and fire investigators."

Ralph Pratt's boat was burned at Taylor's Boatyard fire. He spoke after sentencing.

"I’m extremely disappointed with the sentence. It just doesn't seem like it fits the crime. Anyway you cut it, three fires, seems like they got one year for each fire. The total monetary loss was $600,000. What’s the going rate? I don’t understand the sentencing guidelines," he said.

"For the crimes that they did, the three different fires, they are dangerous. They put people's lives at risk, the firefighters, the regular community, and I think they needed more time than that. But having said that, we deal with what we deal with," District Attorney Tim Cruz said.

MORE AT 6:00. REPORTING LIVE IN ROXBURY, JULIE LONCICH, WCVB NEWSCENTER5. TWO SOUTH SHORE ARSONISTS HEADING TO JAIL AFTER PLEADING GUILTY BUT THERE IS OUTRAGE THAT THEIR SENTENCE IS NOT STRONG ENOUGH. PAM CROSS IS LIVE IN BRIDGEWATER TO EXPLAIN. FIRE TRUCKS ALL OVER THIS AREA A YEAR AGO. A BUILDING ACROSS THE STREET UNDER CONSTRUCTION WAS BURNING DOWN AND HAVINGERS USED G.P.S. TO TRACK THE SUSPECTS. 16 FIRE CHIEFS FILLED ONE SIDE OF THE COURTROOM RESOLVED TO MAKE A STATEMENT BY THEIR PRESENCE. THEY WANTED TOUGH SENTENCES FOR JOHN MARIE J JEANMARIE LOUIS AND HIS FATHER. LOUIS PLEADED GUILTY TO ONE COUNT. WHEN SOMEONE IS SENTENCED THEY CAN ONLY BE PUNISHED FOR THE CRIMES THEY ARE CHARGED WITH AND CONVICTED OF. THE JUDGE SAID WITH NO PRIOR CONVICTIONS SHE WAS LEFT TO FOLLOW THE SENTENCING GUIDELINES. 2 1/2 YEARS FOR LOUIS. OUT AFTER A YEAR. AND TWO TO THREE YEARS IN STATE PRISON FOR SARGENT. BOTH FACE PROBATION. THE CHARGE OF ARSON VIOLATES YOUR HOME, YOUR BUSINESS, YOUR SOUL. THEY ARE DANGEROUS. THEY PUT PEOPLE'S LIVES AT RISK. FIREFIGHTERS, THE REGULAR COMMUNITY. I THINK THEY NEEDED TO DO MORE TIME THAN THAT. I'M EXTREMELY DISAPPOINTED WITH THE SENTENCE. RALPH PRATT WATCHED HIS FISHING BOAT BURN IN THE MARSHFIELD ARSON. WITH THREE FIRES, SEEMS LIKE THEY GOT ONE YEAR FOR EACH FIRE. THE TOTAL MONETARY LOSS WAS $600,000? ONE YEAR FOR EVERY $200,000? I DON'T UNDERSTAND THE SENTENCING GUIDELINES. THE MEN ARE EYED IN TWO DOZEN